Stop-motion for spinning and twisting machines.



W. KOZLOWSKI. STOP MOHON FOR SPINNING AND TWISTING MACHINES. 1,285,742.

Patented Nov. 26, 1918.

3 SHEETS-SHEET l APPLICATION FILED SEPT- 12. l9l3.

W. KOZLOWSKI. SYOP monow FOR SPINNING AND TWIS'HNG MACHINES.

APPLICATION FILED SEPT-1'2. 191 3. 1,2853% Patented Nov. 26, mm

3 SHEETSSHEET 2.

mua

W. KOZLOWSKI.

STOP'MOTION FOR SPINNING AND TWISTING MACHINES.

APPLICATION FILED,SEP.T- 12. 1913.

1,285,742. v Patented Nov. 26, 1918.

3 SHEETS-SHEET 3.

fi'btnes'su: I Y J t aflh a/mm a 3 WLADYSLAW KOZLOWSKI, 0F WARSAW, RUSSIA.

STOP-MOTION FOR SPINNING AND TWISTING MACHINES.

Specification of Letters Patent.

' Patented Nov. 26, 1918.

Application filed September 12, 1913. Serial No. 789,441.

To all whom it may concern:

Be it known that I, WnAnYsLAW KozLow- SKI, of Warsaw, Russia, having invented certain new and useful Improvements in Stop- Motions for Spinning and Twisting Machines, do hereby declare the following to be a full, clear, and exact description of the same.

The invention has reference to improvements in stop motions for spinning and twisting machines, and more particularly to a type of such device designed to provide means to confine the work of the operator, after the breaking of a thread, to tying the latter and the re-inserting of the same into the eye of the thread guide forming a part .of the said device. The thread is prevented from being displaced from its normal position,wl1ile bein tied, or, if the thread should escape from suc normal position, it is automatically re-inserted to proper position, when tension is applied to the thread, after the tying operation is completed.

To this end, the invention consists essentially in the arrangement of means on the fixed Or movable part of a gripper device, or on both, which insures that the thread is antomatically inserted into operative position between the jaws of the device, after the reuniting of the broken ends of the thread and the restarting of the spindle. The thread guide, aforesaid, may have means for adjusting its weight, in order to accommodate the gripping action of the device for any desired thickness of thread. The device for adjusting or regulating the weight, of the thread guide, can also be utilized to balance the latter, which is normally held erect by the tension of the unbroken thread, so as to entirely, or almost entirely, balance the tendency of the thread guide to pull the thread. The dropping movement of the thread guide, occurring when the thread breaks, is, preferably, accelerated by reason of the resilient formation of the guide arm, the latter being normally under tension by the passage of the thread through the eye of the guide, and having an initial movement of comparative rapidity to operative or thread end clamping position.

The balancing or loading of the thread guide may be effected by means of an adjustable weight mounted on the guide arm, or by the lengthening or shortening of the latter, as may be desired. This means is particularly adaptable for use in conjunction with an arrangement for adjustin the hei ht of the thread guide pivot, to allow of tie accommodating of the gripping device to slight variations in the arrangement and dimensions of the machine, to which the invention is to be applied, or to enable the device to be manufactured in a size, or sizes, for use on machines of standard make or dimension.

WVith the foregoing advantages and objects in view, the invention resides in the certain new and usefulconstructions as will he hereinafter more full described, set forth .111 the appended claims, and illustrated in the accompanying drawings, in which,

Figure 1 is a rear elevation of the device,

in position for operation, showing the movable member of the same provided with the device or means for automatically inserting the tied thread between the gripper members, after the restarting of the spindle, and the means for adjusting the balance of the guide arm,

Fig. 2 is a side elevation of the device as in Fig. 1,

.Fig. 1 is a fragmentary front view of the device showing a modified form of the arrangeinent for automatically inserting the thread between the gripper members, after the reuniting of the thread and'the restarting of the spindle,

Fig. 3 is a side elevation of a modified form of the device especially designed for use in connection with the socalled Scottish machines,

Fig. 4 is afront elevation of the device as inFig. 3,

Fig. 4 shows a detail,

Fig. 5 is a view similar to that of Fig. 3, but showing the position of the parts when the thread is broken,

Figs. 6, 7, and 8 are views corresponding to Figs. 3, 4, and 5, of a thread guide having means arranged on the movable gripping member for preventing the thread from escaping from the space between the gripping members,

Fig. 9 is a plan view of a modified form of the means for preventing the thread from escaping from the space-between the gripper members, and for automatically returning the thread to its normal or correct position,

Figs. 10 and 11 are front and side views, respectively, of a thread guide adapted for use in connection with an ordinary type of spinning machine, or the like, and provided with the device for automatically inserting the retied thread between the gripper members,

Fig. 12 is aside view of a modified construction of a suspended arrangement of the device showing the position of the parts prior to the breakage of the thread,

Fig. 13 is a front view of the arrangement shown in Fig. 12-, but showing the parts after the breakage of the thread,

Fig. 1st is a front view of a modified form of the device positioned as in Fig. 13, and,

Figs. 15 and 16 are front and side views, respectively, of the device shown in Fig. 1 inverted for use with a thread guide lever suspended from the thread.

In the device, as shown in Figs. 1 and 2, the numeral 213 represents a fixed part of the frame-work of the machine. To this framework is secured a bracket 207 which arries av gripper jaw 207 provided with a projecting arm 207. Furthermore, a pivot 210 is provided on this bracket, to which is pivoted a movable gripper jaw carrying an arm 21 1. To the arm 21%. is secured an extension carrying a thread guide 215. On the arm 21 1 is adjustably mounted a weight 211- having a projection 21-1". The thread is led between the fixed and movable gripper members 207 and 208, respectively, in the direction shown by the arrow in Fig. 3, over rollers 219, 220, shown in Figs. 3 and 5, and through the eye or guide 215, of the guide lever 214:. The latter remains in an erect position so long as the thread is intact, but when the thread breaks, it drops down into the position shown, by dotted lines, in Fig. 2. The arm 207 which extends rearward in the direction opposite to that of the travel of the thread, may be integral with the part 207, and of a length to extend up to one of the longitudinal beams of the machine.

li hen the thread guide 215 raised to open the gripper jaws 207 and 208 and allow the broken thread to be tied, the thread remains suspended from and over the part 207 and, after having been tied and inserted in the eye, is pulled, without any action on the part of the operator, by the spindle over the upper edge of the part 207 and positioned between the gripper membars or jaws 207 and 208. The apparatus can be adjusted exactly according to the travel of the thread, by either horizontal or vertical adjustment, or both, of the same on the bar 213. I

With the member 207*, which extends to fixed part of the machine, and prevents the thread from passingunder the fixed gripper jaw 207, it is, however, possible that, after taking the end of the thread. coming from the spool. out of the gripper (to the right, 2), the operator mayaccidentally let it drop behind the fixed member 207, and tie it, instead of laying it over the member 207 and tying it, in which case, the pull of the spindle would not draw the thread into position between the gripper surfaces. To prevent an occurrence of this kind, by the arrangement, shown in Fig. 1 the thread is always properly positioned between the gripper members independently of the operator. The fixed gripper jaw 207, in, this case, does not project from one of the lateral lugs supporting the pivot 210, but is connected by a middle part 211 to the bracket 207*, with a semi-circular, or ellip tical part 233 being bent downward transversely to the path of the thread, so that, when the latter has been tied, it is pulled by the spindle and slides upward along one of the edges of the part 233, and then into position between the gripper members or jaws. The shape of this member 233 may be other than semi-circular, or elliptical, as herein before described, as for instance, triangular.

A weight 214- is adjustably mounted on the thread guide extension 215, by means of a set screw. and when properly adjusted, is adapted for regulating the force with which the thread guide fails, when the thread breaks, and the same may be in the form of a ball, as shown, or of any other shape as may be desired.

In the form of the invention, as shown in Figs. 3 to 8, inclusive, which is particularly designed for use in connection with the so called Scottish machines, there is provided the usual frame member 213, whereon is mounted, by means of a screw fastening, a rectangular supporting member 211 to which is adjustably connected, by means of a slot and screw, a standard plate 211, a part 207, of which, forms the fixed gripper jaw of the device, and is an integral part of the standard plate. Pivotally supported by the axle 210, mounted on the standard plate 211, is the movable gripper jaw 217, which, in turn, supports a thread guide lever 21%. The movable gripping member or aw 217, is provided with a recess 217 into which the thread slides, or is drawn through as the case may be, after the broken ends of the thread has been tied. The shape of this recess is clearly shown in Figs. 6 and 9, and a modified form of the same, in Figs. t and 8, The movable gripping member may be curved, as shown in Figs. 3 and or as in Fig. 9.

In the arrangement, as illustrated in Figs. 3 and 5, the pivot pin 210 is provided with an extension 221, which curves around to meet the end of the fixed gripper member 207, so that, if the thread in being tied escapes from the space between the gripper members, the thread is held close to the latter in such a manner that the thread, after having been tied, is pulled, by the action of the spindle, and is automatically guided along the inclined surface, of the extension 221, or of the curved movable gripper memher, as the case may be, between the gripping members. In lieu of the extension 221, of the pin 210, the movable member 217, in the modification, shown in Figs. 6 and 8, is provided with angularly disposed arms 221, which are arranged in such a manner that one of the same always extends over to the fixed gripper member 207, the one in normal the other in the working position of the lever 214, thereby preventing the thread from escaping from between the gripper members. In Fig. 9, the bridge 221, integral with the upright standard plate 211, constitutes a rectangularly bent part of the fixed gripper member, which embraces the movable member. In this arrangement, the movable member has a trunnion 210 pivoted at both sides in the bridge 221.

This method of mounting prevents the movable jaw from yielding, which might occur with a one sided bearing and very thick thread, so that the former would grip with less security.

In using this arrangement, the broken thread is drawn, by the operator, through the annular orifice 217, in the movable member, and is tied to the other end remaining on the spindle. After placing the thread in the guide eye 215, the latter ispulled for- Ward, by the operator, whereby the movable gripper member is raised into the position shown in the detail, Fig. 9, and, upon the re-starting of the spindle, the thread is automatically passed along the circular inclined walls of the orifice 217 and into position between the open gripper members. The edges of the slit, leading to the orifice 217*, are beveled in order to facilitate the exit of the thread from the opening or orifice 217: The thread passing from the bobbin is slightlydiverted aside from its direction of travel, by the pull of the spindle, so that the exit of the same from the orifice 217 and its entrance between the gripper members is greatly facilitated. The gripping surface of the movable member 217 is notched along its direction for better gripping effort, while, by reason of the inclined slit leading to the orifice 217*, the gripping members act positively on the thread, even when the latter is gripped over the slit itself.

In the arrangement shown in Figs. 3, and 8, such is not the case, in consequence of the form of the recess, it being necessary, in this modified construction. to guide the thread by means of an eye 218, which prevents the unbroken thread from coming into the recess. With the arrangement, shown in Fig. 9, the guide 218 may be omitted.

In Figs. 3 and 9, the plate 211, which is fixed to the bar 213, by means of the angularly shaped part, and supports the device,

is adjustable in height, by means of the slit and screw, as shown in Figs. 3 and l, in order to enable this construction being adapted for use in connection with machines of varying arrangement or dimension.

In Fig. 4*,218 is a modified form of guide eye for the thread from the bobbin, for those machines, in which, the device cannot be mounted on the movable bar 213, but only at the side of the same in a laterally movable position. The fork 218 permits lateral movement to the thread in order that the latter may not always touch the same part of the rollers 219 and 220. With machines, in which, the device may be fixed on the movable bar, the bent eye 218 (Fig. 4) is applicable.

In Fig. 6, it is clearly shown that thread guide has the tendency to tip over toward the rollers 219 and 220, so that a certain amount of power is required to initiate its tipping movement. This force is provided by the reaction of the thread guide arm, when the tension of the thread suddenly ceases, on breakage occurring to the latter, the guide arm being, preferably, of spring metal, and normally bent under the tension of the thread.

With ordinary machines, in which, the thread guide is suspended from the thread, and itself forms the movable gripper member, as in Figs. 10 and 11, the device for automatically re-inserting the tied thread, after the restarting of the spindle, comprises a stud 225 projecting from the thread guide parallel with the pivot 210, of the latter, with the thread removed from between the gripper member for tying being drawn by the tension along the top of the stud 225, and between the gripper "members, the top of the stud being inclined upward toward the gripper members. In this case, the apparatus is also vertically adjustable on the bar 218, as shown in Fig. 10, in order that it may be set according to'the direction of movement of the thread. 1

- In Figs. 12 and 13, there is shown a stop motion for throstle machines, and which is provided with means for preventing the thread from leaving the space between the gripper members. The thin thread guide lever 214 is nearly balanced by means of a member 225 fixedly secured to the lever, and pivoted by a pin 210 carried by a plate or support, which is adjustably connected, by means of a slot and screw, to the bar 213 of the machine. The plate or support is provided with a part 207, substantially rectangular in form, and which forms the fixed gripper member of the device. Rigidly connected to the said support, by means of an arm, is an eye, leading the thread between the gripper members, the movable gripper member being formed by the member 225, the upper end of which being beveled, as at 217, for better gripping. Pivotally connected with the part 225, by means of a sleeve 229, is a fork 228, the forward end of which being flattened and extending normally nearly up to the rollers 111, 111, and resting on the lower of the latter, the arrangement of the rollers being well known in throstle machine construction, and located behind two other pairs of rollers 1, 1 and 11, 11.. Fixedly connected to the frame-work carrying the rollers is a substantially Tshaped piece 231, of equal length of the rollers. This piece. 281 is provided for leading the thread-end coming out of the rollers 111, 111, between the other pairs of rollers, and up to the hand of thetoperator.

hen the thread breaks, the lever 21% drops down, so that the fork 228 is brought between and in contact with both of the rollers 111, 111, so that the latter pull the fork more and more forward, whereby the upper roller 111 is lifted from the power driven lower roller 111, thus relieving the thread from the pulling action of the rollers. Immediately after this has been done, the gripper members clamp the thread, which will now break, as the rollers 11, 11, continue to pull it through the space between the rollers 11, 11., and 111, 111, where it is prevented from dropping by the T-shaped member 231. The operator, now lifting the lever 21%, re establishes the position of the parts, as shown in F 12, the thread end lying on the T-shaped piece 231 being again transported and now comes automatically between the rollers 11, 11, and 1, 1, and out of the latter, so that the operator may now tie it to the free end on the spindle. lVith this device, the thread is automatically guided by the eye 230 into the gripper and is prevented from escaping therefrom by the lateral parts of the fork 228.

As is clearly shown in Fig. 13. which is a front view of the device as in Fig. 12, but with the rollers removed, the middle part of the fork is longer than the sleeve or shell 229, so that the stop motion may be moved to and fro independently of the fork, when the same is held in engagement between the rollers, the to and fro in vement being usual for preventing the thread contacting the rollers, at any one spot thereon, continuously, so that the wear on the latter is distributed over practically their entire surface.

In the modification, shown in Fig. 14, the fork is adapted for the same purpose. and is fixedly connected to the sleeve or shell 229. but the latter is formed with a middle part which is longer than the sleeve or shell.

W ith the thread guide suspended from the thread, a device for automatically placing the thread between the gripper jaws. as shown in Fig. 1 is of special advantage, and the de iice only requires to be inverted, as in Figs. 15 and 16, the parts 211 and being upwardly directed, for adaptation to another form of machine, but in all cases, the part 233 may carry the indispensable guide 230 for the threat.

hat I claim is 1. In a stop motion device for spinning and twisting machines the combination of a pivoted thread guide lever suspended by the unbroken thread and swinging downward when the thread breaks to close a thread gripping device with a recess in the movable gripping member with inclined surface adapted to automaticallv guide and insert thereby the tied thread between the gripping members after restarting of the spindle.

2. In a stop motion device for spinning and twisting machines the combination of a pivoted thread guide lever suspended by the unbroken thread and swinging downward when the thread breaks to close a thread gripping device with a recess in the movable gripping member with inclined surface adapted to automatically guide and insert therebv the tied thread between the griping members a'tter restarting of the spindle and with means preventing the thread from leaving the neighborhood of the gripping members.

3. In a stop motion device for spinning and twisting machines the combination of a pivoted thread guide lever suspended by the unbroken thread and swinging downward when the thread breaks to close a thread gripping device with a recess in the movable gripping member with inclined surface adapted to automatically guide and insert thereby the tied thread between the grip ping members after restarting of the spindle, and with arms on the fixed gripping member preventing the thread from leaving the neighborhood of the gripping members.

In a stop motion device for spinning and twisting machines the combination ofa pivoted thread guide lever suspended by the unbroken thread and swinging downward when the thread breaks to close a thread gripping device with a recess in the movable gripping member with inclined surface adapted to automatically guide and insert thereby the tied thread between the grip ping members after restarting of the spindle and with a U-shaped piece in which the thread guide lever is pivotally supported, the middle partof the piece forming the fixed gripping member, and the lateral legs supporting the pivot of the thread guide lever the arms for preventing the thread from leaving the neighborhood of the gripper members.

In a stop motion device for spinning and twisting machines the combination of a. pivoted thread guide lever suspended by the unbroken thread and swinging downward when the thread breaks to close a thread gripping device with means carried by the gripping device for automatically inserting the thread between the gripping members after reuniting and restarting of the spindle.

6. In a stop motion device for spinning and twisting machines the combination of a pivoted thread guide lever suspended by the unbroken thread and swinging downward when the thread breaks to close a thread gripping device with a recess in the movable gripping member with inclined surface adapted to automatically guide and insert thereby the tied thread between the gripping members after restarting of the spindle the inserting means being mounted on the gripping device.

7. In a stop motion device for spinning and twisting machines the combination of a pivoted thread guide lever suspended by the unbroken thread and swinging downward when the thread breaks to close a thread gripping device with a recess in the movable gripping member with inclined surface adapted to automatically guide and insert thereby the tied thread between the gripping members after restarting of the spindle whatever position the thread may have after the reuniting by the operator and with means preventing the thread from leaving the neighborhood of the gripping members.

8. In a stop motion device for spinning and twisting machines the combination of a pivoted thread guide lever suspended by the unbroken thread and swinging downward when the thread breaks to close a thread gripping device with a recess in the movable gripping member with inclined surface adapted to automatically guide and insert thereby the tied thread between the gripping members after restarting of the spindle whatever position the thread may have after the reuniting by the operator, and with arms on the fixed gripping member preventing the thread from leaving the neighborhood of the gripping members.

9. In a stop motion for spinning and twisting machines the combination of a pivoted thread guide lever suspended by the unbroken thread and swinging downward when the thread breaks to close a thread gripping device with a recess in the movable gripping member with inclined surface adapted to automatically guide and insert thereby the tied thread between the gripping members after restarting of the spindle whatever position the thread may have after the reuniting by the operator and with a U- shaped piece in which the thread guide lever is pivotally supported, the middle part of the piece forming the fixed gripping memher, and the lateral legs supporting the pivot pin of the thread guide lever the arms for preventing the thread from leaving the neighborhood of the gripping members.

In testimony whereof I afiix my signature in presence of two witnesses.

VVLADYSLAW KOZLOWSKI.

Witnesses:

ALFRED HYEscz, ANDREJ KUCUAI.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

